While rearranging a modular bench setup in my workshop today, I noticed that the sliding section I built years ago has started behaving unpredictably, especially when I try to raise the panel to a specific height. The mechanism doesn’t fail, but the motion no longer follows a steady pace, and I struggle to get repeatable positioning. Since I may rebuild the moving assembly from scratch, I figured it would be smart to learn what actually creates the controlled travel inside modern motion devices before I even look at replacement options.